<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        function tab(n) {
            if (n == 1) {
                return 1;
            } else {
                return 1 / (n / tab(n - 1));
            }
        }
        // console.log();


        let sum = 0;
        let i = 1;
        while (i <= 10) {
            sum = sum + tab(i);
            i++;
        }
        console.log(sum);
    </script>
</body>

</html>